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Date:      Sat, 7 Feb 2004 19:29:36 +0200
From:      Ion-Mihai Tetcu <itetcu@apropo.ro>
To:        "Mazen S. Alzogbi" <freebsd@mazenalzogbi.com>, questions@freebsd.org
Subject:   Re: Accessing Windows files from FreeBSD
Message-ID:  <20040207192936.7ca83d0a@it.buh.cameradicommercio.ro>
In-Reply-To: <000001c3ed9b$bef002a0$23daa5d9@winstation>
References:  <20040207180600.6c3c3206@it.buh.cameradicommercio.ro> <000001c3ed9b$bef002a0$23daa5d9@winstation>

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[please don't top-post, it makes hard to follow]

[cc'ed back to the list]

On Sat, 7 Feb 2004 20:59:16 +0400
"Mazen S. Alzogbi" <freebsd@mazenalzogbi.com> wrote:

> Hi Ion-Mihai,
> 
> I appreciate your help (and Ads Serpe's too). The question now, how can
> I know the /dev/???? Part?
> 
> I have many "devices" mapped under /dev/ and I have no clue which one
> maps to which!!

It goes like this: 

- if there are ATA disks their name is ad 

- if there are SCSI disks their name is da 

- hard-disks are numbered from 0

- slices are numbered from 1 

- bsd slices are denoted by letters a - the /, c - the hole slice, b -
swap, d-h normal partitions

So the root partition of the first slice of the first ata disk (the
firts ata disk is the primary master) will be: ad0s1.

Now if you do a fdisk you will get something like:

itetcu@it> /tmp [19:13:05] 1                                                                                     
 # fdisk
******* Working on device /dev/ad0 *******
parameters extracted from in-core disklabel are:
cylinders=238216 heads=16 sectors/track=63 (1008 blks/cyl)

Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=238216 heads=16 sectors/track=63 (1008 blks/cyl)

Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
    start 63, size 20964762 (10236 Meg), flag 0
        beg: cyl 0/ head 1/ sector 1;
        end: cyl 1023/ head 254/ sector 63
The data for partition 2 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
    start 20964825, size 163573830 (79870 Meg), flag 0
        beg: cyl 1023/ head 255/ sector 63;
        end: cyl 1023/ head 254/ sector 63
The data for partition 3 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
    start 184538655, size 20964825 (10236 Meg), flag 80 (active)
        beg: cyl 1023/ head 255/ sector 63;
        end: cyl 1023/ head 254/ sector 63
The data for partition 4 is:
sysid 6 (0x06),(Primary 'big' DOS (>= 32MB))
    start 205503480, size 34604010 (16896 Meg), flag 0
        beg: cyl 1023/ head 255/ sector 63;
        end: cyl 1023/ head 254/ sector 63

with no options fdisk default to print the configuration of the hdd I
have booted from. Let alone the physical parameters for now. What we are
after are is: 

******* Working on device /dev/ad0 *******
--
The data for partition 1 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
    start 63, size 20964762 (10236 Meg), flag 0
--
The data for partition 2 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
    start 20964825, size 163573830 (79870 Meg), flag 0
--
The data for partition 3 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
    start 184538655, size 20964825 (10236 Meg), flag 80 (active)
--
The data for partition 4 is:
sysid 6 (0x06),(Primary 'big' DOS (>= 32MB))
    start 205503480, size 34604010 (16896 Meg), flag 0

This tells me I have 4 slices on the HDD I've booted from, three (1-3)
of which are FreeBSD slices and the 4th being a FAT32 one.

So the name of my win partition is ad0s4

the mount command will be:
mount_msdos /dev/ad0s4 /mnt

because I don't want to tape every time all this, i've added in my
/etc/fstab the following line:
/dev/ad0s4	/vol/it/xp	msdosfs		ro	0	0
   ^             ^                 ^            ^
device          mount_point      type       read_only


> You guessed it, a newbie here :)

The newbee out there should do himself a favor and read the handbook,
the FAQ and make extensive use of apropos(1) and man(1) commands.



-- 
IOnut
Unregistered ;) FreeBSD user



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